Centrifugal machine.



W. M'AGHELSBN. DENTRIPUGAL MACHINE. NLIGATION TLLED mum?. w12.

Patenten 0011.8, 1912.

2 SHEETS-SHEET 2.

bte/wmf WALDEMAR IVIICHLSEN, OF JATIBONIQ), CUBA.

To all whom t may concern CENTRI'FUGAL MACHINE.

Specification of Letters Patent.

Patented oet. 8,1912.`

`Application filed January 27, 1912. Serial No. 673,909.

Be it known that I, WALDEMAR MICHEL- i SEN, a'subject of the King ofNorway, re-

sidingat Jatibonico, Cuba, have invented Icertain new and 'usefulImprovements in `('lentrifugal Machines; and I do hereby `deelare thefollowing to be a full, clear, and exact description ofthe invention,such as Will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to an vimproved centrifugal separator, and itconsists in the for etlicient constructions, combinations, andarrangey"ments herein Vdescribed rand claimed.

An yobject of my invention is to provide an improved centrifugalseparator adapted operation with either pasty mix# tures, as pulp, etc.,or sticky, slow-flowing materials, asmassecuite, etc.

v A further lobject of vmy invention is to vprovide an improvedcentrifugal separatorin "which'the screening walls will be automaticallymaintained in an open, unclogged condition, a'nd the material :fedtherealong with a uniform `vrprogressi ve movement by gravity. .A.further object of my invention is to provide an improved centrifugalseparator in whichthe mass of material acted upon will be alternatelycompressed and loosened, thereby'insuring a thorough and uniformseparating action throughout the entire mass. A

In the accompanying drawings forming a part of this application, and inwhich similar reference symbols indicate correspond- .ing parts in theseveral v.iews:-Figure 1 is an elevation, with the lett-hand side incentrialV section, illustrating one embodiment ot' my invention; Fig.' 2is a. lan View on the line 2,-2 ot Fig. 1; and, ig. 3 is a section onthe line 3-'-3 of Fig. 1.

Referring to the drawings-1 indicates a central drive shaft providedWith a lower step bearing 2, and having rigidly secured ,thereto a driveand upper' hollow head 5.- A stationarily supported feed hopper 6eommunicateswith i the hollowhead 5, and .rigidly supports a ing shownprovided with oo step bearingl Tfor .theupper end ofvthe drive shaft 1;said hopper and bearing loeerating downwardly diver-ging walls .8 an

pulley 3, lower bracket 4,-

9 for causing.

a uniform distribution of the materialfedl to the hollow head 5, anddefleeting such material from drive shaft. A series of spindles 10 arejournaled at I1, and 12, respectively, into the lower bracket I andhollow head 5, and carry friction gears 13 at their upper ends with acorresponding stationary friction gear 14 on the hopper 6. A screenreceptaele comprising a perforated cylindricalV Wall 15 isconcentrically secured to each i spindle 10 by upper and ably providedwith internal ribs 18. .An independent casing 19 of imperforate materialis rigidly secured to said bracket 4 and head l 5 about each screeningreceptacle, and pro- .70

vided with a rentrant cylindrical partition 20 spaced concentrlcallyabout said recep-l tacle and terminating in' a downwardlyextendinghopper 21; an annular shield 22 being seeuredto the screening receptaclefor loosely iin-losing the upper portion of said cylindrical partition.The casing 19 and f hopper 21 are provided, respectively, with outlets23 and 211 for discharging into any desired receptacles, such as troughsor gut-` 80,

ters. If desired, the discharge outlets from the several casinos can bearranged at different radial distances from the central shaft 1. inorder to permit the material from the different screening receptaclesto-,be dis 85` charged into separate troughs.

ln my lmprovcd construction, the radii of the 'friction gears 13 and 14und cylindrical f screening walls 15 are so proportionedthat thelcentrifugal force produced on said cylindrical walls by axial rotationrabout their spindles 10, is less than they centrifugal force producedon said walls by their rotation i about the central drive shaft' 1. Byythis.'

construction, the material under treatment is compressed against thecylindrical screening walls 15 by a gradually varying cen-7" trifugalforce which is the resultant of the i algebraic sum of the centrifugalforcesdue to the simultaneous axial rotation and revoltion about thecentral shaft 1. This resultant effective centrifugal force reaches amaximum as the cylindrical screening Wall rotates past its outerpositionfarthest from the stepped upper end of'the 55 in engagement 60lower spiders 16. 65 and 17; said cylindrical walls being preferthe.central drive shaft 1, and becomes nega-A tivel as said wall .is rotatedpast its inner glsition'nearest t'o said central drive-shaft.

ing repeated rotations past such inner. position, th'e mass ofmaterialunder 'treat- 'ment is loosened from the perforatedscreening'wall by the preponderance oi the centriugal force due torevolution about the reaches a maximum in the outer position. of i1-said Wall. ltwill be obvious that the intershaft ,1 over that due toaxial-rotation about the spindle thereby causing the loosened materialtobe progressively fed downwardly along the'screening wall by gravity,and automatically maintaining said wall in open, ,i uncle,f gedcondition. Upon continued rotation of the cylindrical screening Wallpast its inner position, the internal ribsjlS will insure the lotisenedmaterial being efficientlycarrir'ed aldngA until the4 vlatter is` againpressel against the .screening wall by'a gradually increasingcentrifugal force which nal'ribs 18 can be given anyl desired :Forneyfeo i and that'for pulp andother(J nonsticky'ma':

terials, said ribs may advantageously extend spirally or be inclined. Bythus alternately compressing and loosening the material un- ',dertreatment and automatically maintaining the screening walls inv an"unclogged c0ndition,`an evfiicient separating action will.

be obtained uniformly throughout thev en-v tire mass, and the capacityor output of the' machine maintained at a maximum.

' 'A spout 25 is .provided for directing the material from the hollowhead 5. to leach 'screening receptacle; said spout being arranged ltodirect the'material slightly below the upper edges of the. cylindricalwall and at points past .the position of maximum centrifugal force onsaid walls, as shown in Fi s. yl and 2; .thereby insuring an even anduniform distribution of the material over Athe perforated wall 15.' Thespouts 25 can be advantageously vformed of copper, or other yieldingmaterial, inl order. that .they

Imay be conveniently bent to insure an eilicient-initial disposition ofvarious dierent f 'materials on the cylindrical perforated walls..

I my invention.

' I have illustrated and ,described preferred and satisfactoryconstructions, but changes could be made within the spirit and scope of"I I Claim 1 "-1. ln a centrifugal separator, the combination' of,a-drivefshaftupper and lower members secured to said shaft, a seriesoro screening receptacles journaled in said members, independent easingsof imperforate maj@ .several-screening' receptacles, and means car-,riedby said several oasmgs'for discharging the materials acted upon by.the inclosed screenlng receptacles.

'al secured .toaaid members about said 2. In a centriagalseparator, thecombi- Athis materials" acted"upon' by. the incl open bottom vtaclesjournaled insaid memben'an inde-A pendent casing of imperoratematerialsc- .cured to said members about each of saidv wgnationp a.drive shaft; upper and lower `members secured to'said shaft, a seriesof screenin recepdlesgournaled in' said' members, in ependent casings ofimperoratel material'secured 'to said mowers about said severalscreeningreceptaeles, and means caril ried. bysaid several casingsatdifferent distances from said drive shaft fordishargmscreeningreceptacles.

3. ln a centrifugal separator, .the-combination of a drive shatt\,fupperand lower 'members secured to said shaft, a series o1" cylindricalscreening .recepscreening receptacles and provided with a rentrantcylindrical partition extending .above ythe open'bottom ofv'said recetacle,

hollow'head, a step bearing forthe upper end of said shaft rigidlysupported .within said hopper and provided with a down-v wardlydiverging cap portion, spindles journaled in said bracket and head,cylindrical ported on said several spindles, independent caslngs ofimperorate material secured to screening receptacles concentricallysupsaid bracket and hollow head about saidsev,-v eral screeningreceptacles, and coperatingv gears on said hopper and spindles foraxially.

rotating said cylindrical receptacles.

5. In a centrifugal separator, the cornbi-v nation of a drive shaft.,bearings rigidly car# ried thereby, a spindle. journaled in saidbearings, a screening receptacle provided with a perforatedcylindrical'wallsupported concentrically on said spindle, internalyribs' on saidv cylindrical wall, means for driving.

said shaft torevolve said screening receptacle thereabout, andl meansfor simultaneously rotating said receptacle about its spindlev toproduce a ribbed c'ylindrical'w mum centrifugal force produced at saidwail by the revolution of the latter about said shaft. f

lntrifugal force at the 6.' ln a centrifugal separator, the'combi-I'less than the ininination of a drive shaft provided with a.

lower step bearing, a lower bracket and an upper hollow head'secured tosaid shaft, a stationaryv feed hopper communicating with Said hollowhead, a step bearing for the upper end of said shaft rigidly supportedwith-V, 1n said hopper and providedwitha divergfv ning cap, spindlesjournalcdat their respective ends'in said bracket and head, cylindricalscreening. receptacles concentrically 111111110111111 1m said severalspindles, interior nbs 011 the cyhndrxcal Walls of sind recep-1'111111111111. 111011111110105; 't produce n centrifugal force :11 theribbed cylindrical Walls 'thereof 11155;; 17111111 the 111111111111111cuurfugnl fom@ prmuced, 011 Saud reci-pwd@ wals by the revolution of thelatter about Suid drive Slm'fi'.

In 1951111111115' 'lwnfuf, T. unix 'my signa here, 1111 [110.1111'0 111lvm whwsszcs.

Y A I ,D [CM AR NIVIC'IIELSEN. \Vtncssos:

J. A. 'V1/msnm F. J 1V A115101 11.

